Machines



(No Model.) 2 Sheets-Sheet 1.

W. H. BAXTER. ELEVATOR AND SCREEN FOR ORUSHING MACHINES.

No. 446,319. Patented Feb. 10,1891.-

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(No Model.) 2 Sheets-Sheet 2.

W. H. BAXTER. V ELEVATOR AND SCREEN FOR GRUSHING MACHINES.

Patented Feb. 10,1891.

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' STATES \VILLIAM HENRY BAXTER, OF LEEDS, ENGLAND.

ELEVATOR AND SCREEN FOR CRUSHING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 446,319, dated February10, 1891.

Application filed October 14, 1890. Serial No. 368,136. (No model.)Patented in England December 2 1, 1885, No. 15,837.

To all whom it may concern.-

Be it known that I, WILLIAM HENRY BAX- TER, a subject of Her Majesty theQueen of Great Britain, residing at Leeds, in the county of York,England, have invented a new and Improved Elevator and Screen forCrushing- Machines, (for which I have obtained Letters Patent in GreatBritain, No. 15,837, bearing date December 24, 1885,) of which thefollowing is a specification.

My invention relates to an improved elevator and rotary screen speciallyapplicable to stone-breaking and ore-crushin g machines, the objectbeing to facilitate the operation of screening and feeding, to reducethe power required, and to minimize the wear.

In the accompanying drawings I show in apparatus applied to astone-breaking machine, arranged more particularly for the treatment ofmacadam material.

Figure 1 represents an elevation of the apparatus, partly in section,and Fig. 2 an end view of same.

According to my invention, I arrange in connection with a stone-breakerAan elevator, the buckets 1 of whichIplace inside the belt or endlesscarrier 2, instead of outside of the same. The width of the belt 2 is inexcess or wider than the width of the buckets 1, so that its projectingedges 3 3 can run over flanged guide-pulleys 4 4, fast on a horizontalshaft 6, carried by a vertical bracket 6 and a hanging bracket 6". atthe bottom of the apparatus, and over similar pulleys 5 on a similarshaft 7, carried in brackets 8 8, supported on the upper part of theframing. The pulleys of each pair are arranged at such a distance apartas to leave sufficient room for the buckets to pass between them. Thescreens 9 10 are secured at one end to the flanged pulleys 1 5,respectively, and at the other ends to bracket-arms 11 12, carried onthe shafts 6 and 7, respectively,

By arranging the buckets inside the belt it will be seen that as theypass round the bottom pulleys a 4: the belt forms a receptacle intowhich the material is discharged, said material falling into the bucketsas the latter move round. For the purpose of stiffening the belt and tokeep the bucket-s in position when passing over the pulleys, a metalplate 1 may be fastened across the belt behind each bucket, to whichplates the buckets are secured. From this point it is carried up and isdischarged into a curved chute 13, supported by a bent arm 13, attachedto the framing, said chute being preferably placed just above or aboutthe axial line of the shaft 7 of the upper screen, and from which it isdelivered into the screen 10.

The shaft 6 of the lower screen is drivenby a gear-wheel 14, with whicha gear 15 en gages, thelatter being secured on a shaft 16, on which is adriving-pulley 17, the belt of which is operated from the main shaft ofthe crusher A, as shown. It will be seen that the drivinggear is thuskept outside of the screens and elevator and away from the dust. Thescreens'9 10 are so constructed that their shafts 6 7 can be placed in ahorizontal position, instead of being inclined. This is effected byconstructing them of two or more frustums of a cone 18 19 of differenttaper, as shown in the screen 10, so that the feed end 18 will be aquicker incline than the delivery end 19, or the screen may be simplyone frustum or two frustums 20 21 of the same taper, as shown in thescreen 9.

In the arrangement of elevator and screen shown the stone or material isshoveled into the jaws of the crusher A from the platform 22, whence itis conveyed by means of the chute 23 to the lower screen 9, the largermaterial passing'into the bight of the elevatorbelt 2 and being carriedup and discharged down the chute 13 into the portion 18 of the screen10, through which it falls down the chute 24111110 a cart or otherreceptacle, the next size falling through the portion 19 of the screendown the chute 25 onto the platform 22, from whence it may be removed oragain shoveled into the crushing-machine while the largest lumps passout of the end of the screen down the chute 26 into the jaws of themachine.

hat I claim is== 1. In combination, the shafts 6 and 7, the pulleys 4,placed at a distance apart on the shaft 6 and having flanges projectinginward,

a similar pair of pulleys 5 5 on the shaft 7, a carrier-belt havingbuckets on its inner side adapted to pass between the pairs of pulleys,

- and havin also the .roectin ed es extending laterally beyond thebuckets and bearing upon the flanges of the pulleys, substantially asdescribed.

2. In combination, a feed-screen on a r0- tating shaft, areceiving-screen on aseparate shaft, and means for conveying thematerial from the feed-screen t0 the receiving-screen and for rotatingthe latter, consisting of pairs of pulleys 4 5 on the screen-shafts, andabelt extending between and engaging the pulleys,

